The fur I'm trying to make isn't looking like real fur. It's coarse and I don't know how to fix it
You seem to have clumping at 100%, which will make it look coarse.

In Particle Properties->Children->Clumping I changed Clump to 0 and in Particle Properties->Children->Roughness I changed Random to 0.5.  Whilst this may not be exactly what you are after, it looks a lot more 'softer'